Home / 68,318.88-102,481.38-20,930.50

Finding the Fourth Proportional to 68,318.88, 102,481.38 and 20,930.50

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Solution

The fourth proportional to 68,318.88, 102,481.38 and 20,930.50 is: 31,396.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,318.88 : 102,481.38 = 20,930.50 : x
  2. Step 2: Convert to fraction form
    68,318.88/102,481.38 = 20,930.50/x
  3. Step 3: Cross multiply
    68,318.88x = 102,481.38 × 20,930.50
  4. Step 4: Simplify right side
    68,318.88x = 2,144,986,593.32
  5. Step 5: Solve for x
    x = 2,144,986,593.32/68,318.88
  6. Step 6: Final answer
    x = 31,396.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.